Well that's is what I've tried to achieve until know. I mean the Portal is running with a user that is actually using a specific domain account so that it...

okay well.

1/ Our admin do not want of this solution for many reasons, but one of the main being those user would not have a mean to change their passwords,...

Thanks for the answer but first I'm really looking to avoid this extreme way of doing thigs, It really has to be the last options.

As I don't know enough of...